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Capacitive pressure sensor

  • US 7,880,600 B2
  • Filed: 09/30/2008
  • Issued: 02/01/2011
  • Est. Priority Date: 06/06/2002
  • Status: Expired due to Term
First Claim
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1. A pressure sensor in a wheel, the wheel including a rim and a tire, the pressure sensor comprising:

  • a first conductive layer;

    a second conductive layer, wherein the first and second conductive layers form a first capacitor; and

    a compressible dielectric contiguous to the first conductive layer and the second conductive layer;

    wherein the compressible dielectric is formed to have delimited structures configured to adjust an average density of the compressible dielectric; and

    wherein the capacitor is configured to vary a capacitance in response to pressure changes within the tire.

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